How to charge 18650 battery without charger 6v battery charger - YouTube
How to Charge 18650 Li-ion Battery Pack DIY - 3 Easy Ways - YouTube
Amazon.com: 18650 Lithium Battery Charger 4 Bay Universal Fast Charger for 3.7V Li-ion 10440,14500,16340,16650,14650,18350,18500,18650(123A) Ni-MH Ni-Cd A AA AAA AAAA Rechargeable Battery(no Battery) : Electronics